266442728547 has 16 divisors (see below), whose sum is σ = 359438286240. Its totient is φ = 175539936000.

The previous prime is 266442728533. The next prime is 266442728569. The reversal of 266442728547 is 745827244662.

It is a happy number.

It is not a de Polignac number, because 266442728547 - 2¹² = 266442724451 is a prime.

It is a super-3 number, since 3×266442728547³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (266442728597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245097 + ... + 770037.

It is an arithmetic number, because the mean of its divisors is an integer number (22464892890).

Almost surely, 2^266442728547 is an apocalyptic number.

266442728547 is a deficient number, since it is larger than the sum of its proper divisors (92995557693).

266442728547 is a wasteful number, since it uses less digits than its factorization.

266442728547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526934.

The product of its digits is 36126720, while the sum is 57.

The spelling of 266442728547 in words is "two hundred sixty-six billion, four hundred forty-two million, seven hundred twenty-eight thousand, five hundred forty-seven".